Segment Information- Subsegments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Segment Information
Total net revenue	$ 11,588	$ 12,977	$ 23,834	$ 26,835
Operating segments
Segment Information
Total net revenue	11,630	13,269	23,742	27,439
Intersegment Eliminations and Other
Segment Information
Total net revenue	(42)	(292)	92	(604)
Personal Systems | Operating segments
Segment Information
Total net revenue	6,990	7,759	14,457	16,321
Personal Systems | Operating segments | Notebooks
Segment Information
Total net revenue	3,838	4,170	8,043	8,894
Personal Systems | Operating segments | Desktops
Segment Information
Total net revenue	2,402	2,762	4,929	5,711
Personal Systems | Operating segments | Workstations
Segment Information
Total net revenue	461	513	905	1,039
Personal Systems | Operating segments | Other
Segment Information
Total net revenue	289	314	580	677
Printing | Operating segments
Segment Information
Total net revenue	4,637	5,508	9,279	11,104
Printing | Operating segments | Supplies
Segment Information
Total net revenue	3,099	3,684	6,200	7,285
Printing | Operating segments | Commercial Hardware
Segment Information
Total net revenue	1,227	1,376	2,446	2,770
Printing | Operating segments | Consumer Hardware
Segment Information
Total net revenue	311	448	633	1,049
Corporate Investments | Operating segments
Segment Information
Total net revenue	$ 3	$ 2	$ 6	$ 14